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CLC number: X703; X131.2

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Received: 2005-06-29

Revision Accepted: 2005-07-24

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.10 P.1022-1027


Removal of hexavalent chromium from aqueous solution by iron nanoparticles

Author(s):  NIU Shao-feng, LIU Yong, XU Xin-hua, LOU Zhang-hua

Affiliation(s):  Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   xhxu@hzcnc.com

Key Words:  Hexavalent chromium, Iron nanoparticles, Starch, Stabilize, Remediation

NIU Shao-feng, LIU Yong, XU Xin-hua, LOU Zhang-hua. Removal of hexavalent chromium from aqueous solution by iron nanoparticles[J]. Journal of Zhejiang University Science B, 2005, 6(10): 1022-1027.

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author="NIU Shao-feng, LIU Yong, XU Xin-hua, LOU Zhang-hua",
journal="Journal of Zhejiang University Science B",
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%T Removal of hexavalent chromium from aqueous solution by iron nanoparticles
%A NIU Shao-feng
%A LIU Yong
%A XU Xin-hua
%A LOU Zhang-hua
%J Journal of Zhejiang University SCIENCE B
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%DOI 10.1631/jzus.2005.B1022

T1 - Removal of hexavalent chromium from aqueous solution by iron nanoparticles
A1 - NIU Shao-feng
A1 - LIU Yong
A1 - XU Xin-hua
A1 - LOU Zhang-hua
J0 - Journal of Zhejiang University Science B
VL - 6
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SP - 1022
EP - 1027
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2005.B1022

Groundwater remediation by nanoparticles has received increasing interest in recent years. This report presents a thorough evaluation of hexavalent chromium removal in aqueous solutions using iron (Fe0) nanoparticles. Cr(VI) is a major pollutant of groundwater. Zero-valent iron, an important natural reductant of Cr(VI), is an option in the remediation of contaminated sites, transforming Cr(VI) to essentially nontoxic Cr(III). At a dose of 0.4 g/L, 100% of Cr(VI) (20 mg/L) was degraded. The Cr(VI) removal efficiency decreased significantly with increasing initial pH. Different Fe0 type was compared in the same conditions. The reactivity was in the order starch-stabilized Fe0 nanoparticles>Fe0 nanoparticles>Fe0 powder>Fe0 filings. Electrochemical analysis of the reaction process led to the conclusion that Cr(OH)3 should be the final product of Cr(VI). iron nanoparticles are good choice for the remediation of heavy metals in groundwater.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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